function checkresident_id(resident_id){
    var Errors=new Array(
        "验证通过!",
        "身份证号码位数不对!",
        "身份证号码出生日期超出范围或含有非法字符!",
        "身份证号码校验错误!",
        "身份证地区非法!"
    );
    var area={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}
    var retflag=false;
    var resident_id,Y,JYM;
    var S,M;
    var resident_id_array = new Array();
    resident_id_array = resident_id.split("");
//地区检验
    if(area[parseInt(resident_id.substr(0,2))]==null)
        return Errors[4];
//身份号码位数及格式检验
    switch(resident_id.length){
        case 15:
            if ( (parseInt(resident_id.substr(6,2))+1900) % 4 == 0 || ((parseInt(resident_id.substr(6,2))+1900) % 100 == 0 && (parseInt(resident_id.substr(6,2))+1900) % 4 == 0 )){
                ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$/;
//测试出生日期的合法性
            } else {
                ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/;
//测试出生日期的合法性
            }
            if(ereg.test(resident_id)){
                return Errors[0];
            }
            else
            {
                return Errors[2];
            }
            break;
        case 18:
//18位身份号码检测
//出生日期的合法性检查
//闰年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))
//平年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))
            if ( parseInt(resident_id.substr(6,4)) % 4 == 0 || (parseInt(resident_id.substr(6,4)) % 100 == 0 && parseInt(resident_id.substr(6,4))%4 == 0 )){
                ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$/;
//闰年出生日期的合法性正则表达式
            } else {
                ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/;
//平年出生日期的合法性正则表达式
            }
            if(ereg.test(resident_id)){//测试出生日期的合法性//计算校验位
                S = (parseInt(resident_id_array[0]) + parseInt(resident_id_array[10])) * 7
                    + (parseInt(resident_id_array[1]) + parseInt(resident_id_array[11])) * 9
                    + (parseInt(resident_id_array[2]) + parseInt(resident_id_array[12])) * 10
                    + (parseInt(resident_id_array[3]) + parseInt(resident_id_array[13])) * 5
                    + (parseInt(resident_id_array[4]) + parseInt(resident_id_array[14])) * 8
                    + (parseInt(resident_id_array[5]) + parseInt(resident_id_array[15])) * 4
                    + (parseInt(resident_id_array[6]) + parseInt(resident_id_array[16])) * 2
                    + parseInt(resident_id_array[7]) * 1
                    + parseInt(resident_id_array[8]) * 6
                    + parseInt(resident_id_array[9]) * 3 ;
                Y = S % 11;
                M = "F";
                JYM = "10X98765432";
                M = JYM.substr(Y,1);//判断校验位
                if(M == resident_id_array[17]) return Errors[0]; //检测ID的校验位
                else return Errors[3];
            }
            else return Errors[2];
            break;
        default:
            return Errors[1];
            break;
    }
}

function check(){
    if(checkresident_id(document.f1.resident_id.value)!="验证通过!"){
        alert(checkresident_id(document.f1.resident_id.value));
        // return false;
    }else{
        alert('验证通过');
        f1.submit();
    }
}